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/Src/Dependencies/Boost/boost/archive/iterators/mb_from_wchar.hpp

http://hadesmem.googlecode.com/
C++ Header | 136 lines | 100 code | 19 blank | 17 comment | 13 complexity | de61254150e700db18ddfb221a98e413 MD5 | raw file
  1#ifndef BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_HPP
  2#define BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_HPP
  3
  4// MS compatible compilers support #pragma once
  5#if defined(_MSC_VER) && (_MSC_VER >= 1020)
  6# pragma once
  7#endif
  8
  9/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
 10// mb_from_wchar.hpp
 11
 12// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
 13// Use, modification and distribution is subject to the Boost Software
 14// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 15// http://www.boost.org/LICENSE_1_0.txt)
 16
 17//  See http://www.boost.org for updates, documentation, and revision history.
 18
 19#include <boost/assert.hpp>
 20#include <cstddef> // size_t
 21#include <cstdlib> // for wctomb()
 22
 23#include <boost/config.hpp> // for BOOST_DEDUCED_TYPENAME
 24#if defined(BOOST_NO_STDC_NAMESPACE)
 25namespace std{ 
 26    using ::size_t; 
 27    using ::wctomb;
 28} // namespace std
 29#endif
 30
 31#include <boost/serialization/pfto.hpp>
 32#include <boost/iterator/iterator_adaptor.hpp>
 33
 34namespace boost { 
 35namespace archive {
 36namespace iterators {
 37
 38/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
 39// class used by text archives to translate wide strings and to char
 40// strings of the currently selected locale
 41template<class Base>    // the input iterator
 42class mb_from_wchar
 43    : public boost::iterator_adaptor<
 44        mb_from_wchar<Base>, 
 45        Base, 
 46        wchar_t,
 47        single_pass_traversal_tag,
 48        char
 49    >
 50{
 51    friend class boost::iterator_core_access;
 52
 53    typedef BOOST_DEDUCED_TYPENAME boost::iterator_adaptor<
 54        mb_from_wchar<Base>, 
 55        Base, 
 56        wchar_t,
 57        single_pass_traversal_tag,
 58        char
 59    > super_t;
 60
 61    typedef mb_from_wchar<Base> this_t;
 62
 63    char dereference_impl() {
 64        if(! m_full){
 65            fill();
 66            m_full = true;
 67        }
 68        return m_buffer[m_bnext];
 69    }
 70    char dereference() const {
 71        return (const_cast<this_t *>(this))->dereference_impl();
 72    }
 73
 74    // test for iterator equality
 75    bool equal(const mb_from_wchar<Base> & rhs) const {
 76        // once the value is filled, the base_reference has been incremented
 77        // so don't permit comparison anymore.
 78        return 
 79            0 == m_bend
 80            && 0 == m_bnext
 81            && this->base_reference() == rhs.base_reference()
 82        ;
 83    }
 84
 85    void fill(){
 86        wchar_t value = * this->base_reference();
 87        #if (defined(__MINGW32__) && ((__MINGW32_MAJOR_VERSION > 3) \
 88        || ((__MINGW32_MAJOR_VERSION == 3) && (__MINGW32_MINOR_VERSION >= 8))))
 89        m_bend = std::wcrtomb(m_buffer, value, 0);
 90        #else
 91        m_bend = std::wctomb(m_buffer, value);
 92        #endif
 93        BOOST_ASSERT(-1 != m_bend);
 94        BOOST_ASSERT((std::size_t)m_bend <= sizeof(m_buffer));
 95        BOOST_ASSERT(m_bend > 0);
 96        m_bnext = 0;
 97    }
 98
 99    void increment(){
100        if(++m_bnext < m_bend)
101            return;
102        m_bend = 
103        m_bnext = 0;
104        ++(this->base_reference());
105        m_full = false;
106    }
107
108    // buffer to handle pending characters
109    int m_bend;
110    int m_bnext;
111    char m_buffer[9];
112    bool m_full;
113
114public:
115    // make composible buy using templated constructor
116    template<class T>
117    mb_from_wchar(BOOST_PFTO_WRAPPER(T) start) :
118        super_t(Base(BOOST_MAKE_PFTO_WRAPPER(static_cast< T >(start)))),
119        m_bend(0),
120        m_bnext(0),
121        m_full(false)
122    {}
123    // intel 7.1 doesn't like default copy constructor
124    mb_from_wchar(const mb_from_wchar & rhs) : 
125        super_t(rhs.base_reference()),
126        m_bend(rhs.m_bend),
127        m_bnext(rhs.m_bnext),
128        m_full(rhs.m_full)
129    {}
130};
131
132} // namespace iterators
133} // namespace archive
134} // namespace boost
135
136#endif // BOOST_ARCHIVE_ITERATORS_MB_FROM_WCHAR_HPP